Ferromagnetic Resonance Identification (FMR-ID) under Low Magnetic Field for microwave RFID

A method for ferromagnetic resonance identification (FMR-ID), using magnetic nanowires (MNWs) made from cobalt-iron, is presented for sub-mmWave RFID applications. For use in a tag, a circuit comprised of a MNW chip with copper back placed above a grounded coplanar waveguide (GCPW) line is evaluated...

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Bibliographic Details
Published in2024 IEEE Wireless and Microwave Technology Conference (WAMICON) pp. 1 - 4
Main Authors Anas, Md Toaha, Wege, Alex, Harpel, Allison, Chen, Yicong, Stadler, Bethanie J. H., Franklin, Rhonda
Format Conference Proceeding
LanguageEnglish
Published IEEE 15.04.2024
Subjects
Absorption
anodized aluminum oxide
cobalt-iron nanowires
Coplanar waveguides
Ferromagnetic resonance
FMR-ID
Frequency measurement
grounded coplanar waveguide
Magnetic fields
Permanent magnets
Radiofrequency identification
RFID
Security
Semiconductor device measurement
Wireless communication
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Summary:A method for ferromagnetic resonance identification (FMR-ID), using magnetic nanowires (MNWs) made from cobalt-iron, is presented for sub-mmWave RFID applications. For use in a tag, a circuit comprised of a MNW chip with copper back placed above a grounded coplanar waveguide (GCPW) line is evaluated. According to simulation, minimal mismatch in the GCPW line and maximum FMR absorption in the MNW chip occurs when it is centered over the gap of the GCPW line. Five unique DC magnetic field strengths, between 0 and 0.2 T, have been applied perpendicular to the MNW chip. The detected FMR absorption is observed at five sub-mmWave frequencies between 20 and 30 GHz. This approach lays the foundation for five-bit tag identification addressing.
DOI:10.1109/WAMICON60123.2024.10522813